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A finite volume approach for shallow water flow accounting for high‐resolution bathymetry and roughness data
Author(s) -
Volp N. D.,
Prooijen B. C.,
Stelling G. S.
Publication year - 2013
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1002/wrcr.20324
Subject(s) - bathymetry , finite volume method , grid , flow (mathematics) , geology , surface finish , volume (thermodynamics) , waves and shallow water , resolution (logic) , grid cell , surface roughness , mechanics , geometry , geodesy , mathematics , computer science , materials science , physics , oceanography , quantum mechanics , artificial intelligence , composite material
This study presents a finite volume hydrodynamic model for shallow water flow that computes on a coarse grid, but accounts for high‐resolution bathymetry and roughness variations on a subgrid. The detailed information can be incorporated by using the assumption of a uniform flow direction and a uniform friction slope within a part of a coarse‐grid cell. It is shown in two examples that the results of coarse‐grid simulations become as good as high‐resolution results, but at much lower computational cost.